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W. Section No. 5.0 Revision No. 6 Date 6/1/88 Page 12 Additionally, all sample collection and preservation procedures designed for the sampling project should be followed to assure sample representativeness and integrity. The sample label (see Attachment 11) on each sample container should be completed in its entirety to assure that all pertinent information accompanies the sample to the laboratory. Complete information on each label is necessary so that if the sample container is separated from the rest of the shipment in the laboratory, sufficient information is available on the Jabal to ascertain the scheduled work required on the sample. The chain-of-custody form should reflect the identification of each sample for which laboratory results are requested. If samples are to be held at the laboratory pending further instructions, an appropriate comment should be made on the chain-of- ', custody form. Each sample must be uniquely identified. The administrative sample tracking system maintained by the laboratory allows each sample batch to be identified with a alpha-numeric label containing a maximum of 20 characters. B. Sample Receipt Sample receipt is the first contact that the laboratory has with the sample. Control and documentation of all samples are instituted at the time of receipt. Upon receipt of the samples to the laboratory, the Sample Custodian will verify that the incoming samples correspond to the chain-of-custody and note the.condition in which the sample is found. Missing samples, samples which have broken, or become compromised during shipment, are noted on the chain-of-custody form. If no chain-of-custody form is found in the shipping container, an inventory of the samples is taken and the person from whom the samples were received is immediately contacted. A chain-of-custody form is then completed by the sample custodian in accordance with the instructions of the sampler/client, After checking the chain-of-custody form against the samples received, the sample custodian then obtains a Lab Project (LP) number from the data control section and assigns the LP number to the chain-cf- custody.